Gastrolobium rotundifolium Meisn.
Gilbernine Poison

Scientific Description

Erect, shrub, spindly shrub (broom-like). Stems terete or angular, spiny at least in part, hairy; pustules or glands absent. Leaves or phylloclades clearly present, simple, opposite, continuous with stem, 15-30 mm long, 6-20 mm wide, glabrous, flat with flat margins; margins entire; tubercles absent; pustules or glands absent. Stipules present and persistent to older leaves. Pedicel present, 2 mm long, hairy. Bracteoles present but early deciduous. Calyx 6.5 mm long, not accrescent, hairy, with simple hairs, ribless; pustules or glands absent. Corolla 12 mm long, multicoloured, mostly yellow, red or orange, with some yellow, red or orange spots, streaks or blotches; claws present; standard 12 mm long, glabrous, auriculate, wings 10 mm long, auriculate, keel 10 mm long, not beaked, auriculate, glabrous. Stamens ten; anthers 0.6-0.7 mm long, at two different levels (filaments alternately long and short); filaments free (or united at the very base), 6.6-9.5 mm long. Ovary stipitate, hairy or glandular; style 10.2 mm long, hairy or glandular towards the base, not bearded, terete. Fruit dehiscent (a pod or follicle), 5.5-8 mm long, 4-4.5 mm wide, stipitate, not constricted between the seeds, round in cross-section, hairy, with simple hairs, not beaked. Flowers in August and September. Occurs in the South-West Botanical Province, in the Geraldton Sandplains and Avon Wheatbelt IBRA regions. Conservation Code Priority Three (P3).